Assay cards



FIG. 1 is a front elevational view of an assay card showing our new design, the rear being a mirror image;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a front elevational view of a second embodiment of the assay card of FIG. 1, the rear being a mirror image;

FIG. 4 is a side elevational view of the embodiment illustrated in FIG. 3;

FIG. 5 is a front elevational view of a third embodiment of the assay card of FIG. 1, the rear being a mirror image; and

FIG. 6 is a side elevational view of the embodiment illustrated in FIG. 3. 

The ornamental design for assay cards, as shown and described. 